title: In situ study of the gas-phase electrolysis of water on platinum by NAP-XPS.
abstract: Chasing down the active state: Near-ambient-pressure X-ray photoelectron spectroscopy was used to study the surface of a Pt electrode during the oxygen evolution reaction (OER). A hydrated Pt metal phase with dissolved oxygen in the near-surface region is OER-active and considered to be the precursor of the analytically detected PtO2 , which is in fact the deactivation product of the electrode.
authors.affiliation: Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck Gesellschaft, Faradayweg 4-6, 14195 Berlin (Germany); Max-Planck-Institut für Chemische Energiekonversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr (Germany). arrigo@fhi-berlin.mpg.de.
authors.forename: Rosa
authors.initials: R
authors.lastname: Arrigo
authors.forename: Michael
authors.initials: M
authors.lastname: Hävecker
authors.forename: Manfred E
authors.initials: ME
authors.lastname: Schuster
authors.forename: Chinmoy
authors.initials: C
authors.lastname: Ranjan
authors.forename: Eugen
authors.initials: E
authors.lastname: Stotz
authors.forename: Axel
authors.initials: A
authors.lastname: Knop-Gericke
authors.forename: Robert
authors.initials: R
authors.lastname: Schlögl
keywords: Nafion; X-ray photoelectron spectroscopy; platinum; water electrolysis